/etc/systemd/system/multi-user.target.wants
Edit: /usr/lib/systemd/system/fstrim.timer (229B)
[Unit]
Description=Discard unused blocks once a week
Documentation=man:fstrim
ConditionVirtualization=!container
[Timer]
OnCalendar=weekly
AccuracySec=1h
Persistent=true
RandomizedDelaySec=6000
[Install]
WantedBy=timers.target